大声弹效应
Large acoustoelastic effect
摘要：
经典声弹性理论将小振幅弹性波的传播耦合到无限小的预变形，以非破坏性地揭示和计算三阶弹性常数。在这里，我们看到声弹性也可以用来确定四阶常数，简单地通过耦合一个小振幅波与一个小但有限的预变形。我们目前的结果可压缩弱非线性弹性，我们作出的联系与历史结果布里奇曼的物理高压，我们展示了如何确定“D”，所谓的四阶弹性常数软（不可压缩，各向同性）固体使用无穷小波。
英文摘要：
Classical acoustoelasticity couples small-amplitude elastic wave propagation to an infinitesimal pre-deformation, in order to reveal and evaluate non-destructively third-order elasticity constants. Here, we see that acoustoelasticity can be also be used to determine fourth-order constants, simply by coupling a small-amplitude wave with a small-but-finite pre-deformation. We present results for compressible weakly nonlinear elasticity, we make a link with the historical results of Bridgman on the physics of high pressures, and we show how to determine "D", the so-called fourth-order elasticity constant of soft (incompressible, isotropic) solids by using infinitesimal waves.
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